ethtool: bump to version 3.15

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ethtool/ethtool.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ETHTOOL_VERSION = 3.14
+ETHTOOL_VERSION = 3.15
 ETHTOOL_SOURCE = ethtool-$(ETHTOOL_VERSION).tar.xz
 ETHTOOL_SITE = $(BR2_KERNEL_MIRROR)/software/network/ethtool
 ETHTOOL_LICENSE = GPLv2